K 10
svn:author
V 4
jeff
K 8
svn:date
V 27
2010-01-26T06:36:10.008134Z
K 7
svn:log
V 1516
 - Move the softdep journal inode into the namespace at /.sujournal.  This
   requires quite a lot of code as tunefs needs to be able to create
   directory entries in ROOTINO.  However this is much cleaner from a
   compat standpoint.  The inode is marked IMMUTABLE and only readable by
   root.  Eventually the kernel will prevent clearing of the IMMUTABLE bit.
 - Fix a nasty link count bug involving changedirectory_offset().  When
   a link may exist at more than one location depending on when the
   directory block was written we create duplicate addref records.  When
   an add and a remove are detected at the same offset the remove is
   discarded based on the assumption that it cancels the link in the add.
   A legitimate remove may collide with one of these alternate offset adds
   that are created by fsck and be discarded even though it removed a real
   link.  To resolve this the lineage of the addref must be established
   to determine whether the remove refers to an alternate address or not.
   Any offset which is not up-to-date with respect to the offset in the
   move record is considered alternate and will not discard a remove.
 - Use clear_remove() when we begin to exhaust dependencies to prevent
   excessive looping in request_cleanup().  This should probably
   also be done in softdep_fsync().  Only workloads which delete
   incredible numbers of files within the same directory would be
   affected.  stress2 can generate over 100,000 outstanding removes on
   my test machine.

END